Nws yog tus qauv siv cov lus qhuab qhia ntawm qhov sib luag hauv kev ua haujlwm ntawm cov khoom siv hauv kev suav, feem ntau yog cov uas tsis muaj qhov sib npaug ntawm cov khoom siv thiab lub ntiaj teb kev ua txhaum. Lub tshuab no tau piav qhia hauv qhov zoo, qhov tsis zoo thiab xoom-ib ntu impedance qhov tseem ceeb rau cov ntsiab lus ntawm cov khoom siv hluav taws xob. Rau peb-theem transformer, qhov ua tau zoo thiab tsis zoo ib ntus impedance qhov tseem ceeb yog sib npaug ntawm tus nqi tau piav qhia saum toj no, txawm li cas los xij, qhov zero-sequence impedance sib txawv los ntawm kev txhim kho ntawm lub transformer.
IEC 60076-1Nqe 10.7 "Kev ntsuas ntawm xoom-sequence impedance(s) raupeb-theem transformers
IEEE C57.12.90 Clause 9.5 "Zero-phase-sequence impedance
IEEE C57.12.90 Clause 9.5 "Zero-phase-sequence impedance
Tom qab lub ntsiab txhais, xoom-sequence impedance yog qhov impedance ntsuas ntawm theem davhlau ya nyob twg (peb theem txuas nrog) thiab nruab nrab, uas tsuas yog ua tau hauv lub hnub qub- lossis zig-zag- txuas windings. Lub zero-sequence impedance, ntaus nqi rau txhua theem, yog peb npaug ntawm tus nqi ntsuas.
Qhov loj me yuav tsum tau nqa tawm ntawm qhov ntsuas zaus thiab txuas ntxiv nrog lub zog ntawm lub tank, vim qhov tseeb ntawm nws cov kev cuam tshuam ntau dhau ntawm qhov zero-sequence impedance. Lub zero-sequence flux kuj tseem tuaj yeem ua kom tsis muaj cua sov hauv cov khoom siv hlau xws li lub tank, cowl, lossis clamping siv. Yog vim li cas qhov kev ntsuas tam sim no yuav tsum tsis txhob muaj ntau tshaj 30% ntawm cov npe tam sim no. Tam sim no mus rau nominal niaj hnub tsuas yog lees txais rau lub sijhawm luv luv. Kev siv hluav taws xob yuav tsum tau tshaj tam sim no tsis yog theem-rau-nruab nrab voltage hauv chav kawm ntawm kev ua haujlwm zoo tib yam.